<?php  // $Id: report.php,v 1.45.2.2 2008/05/01 07:40:54 jamiesensei Exp $

// This script uses installed report plugins to print quiz reports

	require_once('../../config.php');
	require_once($CFG->dirroot.'/mod/quiz/locallib.php');
	require_once($CFG->dirroot.'/mod/quiz/report/reportlib.php');

	$id = optional_param('id',0,PARAM_INT);	// Course Module ID, or
	$q = optional_param('q',0,PARAM_INT);	 // quiz ID

	$mode = optional_param('mode', 'overview', PARAM_ALPHA);		// Report mode

	if ($id) {
		if (! $cm = get_coursemodule_from_id('quiz', $id)) {
			error("There is no coursemodule with id $id");
		}

		if (! $course = get_record("course", "id", $cm->course)) {
			error("Course is misconfigured");
		}

		if (! $quiz = get_record("quiz", "id", $cm->instance)) {
			error("The quiz with id $cm->instance corresponding to this coursemodule $id is missing");
		}

	} else {
		if (! $quiz = get_record("quiz", "id", $q)) {
			error("There is no quiz with id $q");
		}
		if (! $course = get_record("course", "id", $quiz->course)) {
			error("The course with id $quiz->course that the quiz with id $q belongs to is missing");
		}
		if (! $cm = get_coursemodule_from_instance("quiz", $quiz->id, $course->id)) {
			error("The course module for the quiz with id $q is missing");
		}
	}

	require_login($course, false, $cm);
	$context = get_context_instance(CONTEXT_MODULE, $cm->id);
	require_capability('mod/quiz:viewreports', $context);

	// if no questions have been set up yet redirect to edit.php
	if (!$quiz->questions and has_capability('mod/quiz:manage', $context)) {
		redirect('edit.php?cmid='.$cm->id);
	}

	// Upgrade any attempts that have not yet been upgraded to the
	// Moodle 1.5 model (they will not yet have the timestamp set)
	if ($attempts = get_records_sql("SELECT a.*".
		   "  FROM {$CFG->prefix}quiz_attempts a, {$CFG->prefix}question_states s".
		   " WHERE a.quiz = '$quiz->id' AND s.attempt = a.uniqueid AND s.timestamp = 0")) {
		foreach ($attempts as $attempt) {
			quiz_upgrade_states($attempt);
		}
	}

	add_to_log($course->id, "quiz", "report", "report.php?id=$cm->id", "$quiz->id", "$cm->id");

/// Open the selected quiz report and display it

	$mode = clean_param($mode, PARAM_SAFEDIR);

	if (! is_readable("report/$mode/report.php")) {
		error("Report not known ($mode)");
	}

	include("report/default.php");  // Parent class
	include("report/$mode/report.php");

	$report = new quiz_report();

	if (! $report->display($quiz, $cm, $course)) {			 // Run the report!
		error("Error occurred during pre-processing!");
	}

/// Print footer

	print_footer($course);

?>
